Hey, sounds good! The.. wifi, not the sound..
Sound - yeah had some 'dummy output' myself.. on a dual-boot. Had to boot into Windows, shutdown, then power on, and boot into Zorin - sound active! I have Intel "Smart Sound Technology" (I put quotes cause I think it's dumb..).
So, try this - boot into a Windows installer (USB or disc), click around a bit, maybe look through some options but do not change anything permanent!! I.e., no partition changes, no installing, etc.. and then shutdown.
I've revived my sound this way after installing, not Zorin, but after installing Linux - but also not shutting down, just rebooting. Windows takes over the sound bus on new systems, especially during a warm-boot - fun, right? 
I try to keep a light heart on some of this stuff - just because I know how frustrating it can be..
The days of just nuking a HDD/SSD and installing Linux to just work - are done.. Secure boot, Fast startup, new Windows stuff taking over hardware during warm-boots - all stuff that I've had to learn myself through the last few years. The sound problem drove me insane.. the installer played, at full volume, the Zorin start sound - pleasant.. but gots the ringin in me ears now 
jk.. light hearted thing agian..
Give that a shot - see if that helps, if it doesn't - we're here for anything you need! I'm on east coast time (US here), so might be a bit of a delay - but tons of good guys and gals here! 